Laser-excited ultrahigh-resolution photoemission study of anisotropic s-wave superconductor YNi2B2C

T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima, S. Shin, T. Togashi, C. T. Chen, C. Q. Zhang, S. Watanabe, T. Watanabe, M. Nohara, H. Takagi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have performed laser-excited ultrahigh-resolution photoemission spectroscopy of Y(Ni1-xPtx)2B2C (x=0.0, 0.2) and numerical simulation using s, anisotropic s and even s+g symmetry to study the superconducting gap anisotropy in borocarbide supercodnuctors. We observed the reduction of gap anisotropy in the x=0.2 sample in comparison to the x=0.0 sample, confirming the anisotropic s-wave gap. We also found that the spectrum of x=0.0 at 3.5 K cannot be fitted well with the s+g-wave symmetry, implying that the s+g symmetry is too simple to describe over all supercodncuting gap electronic structure of borocarbides.

Original languageEnglish
Pages (from-to)469-470
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006

Keywords

  • Anistropic s-wave superconductorp
  • Antiferromagnetic superconductor
  • Photoemission spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Baba, T., Yokoya, T., Tsuda, S., Kiss, T., Shimojima, T., Shin, S., Togashi, T., Chen, C. T., Zhang, C. Q., Watanabe, S., Watanabe, T., Nohara, M., & Takagi, H. (2006). Laser-excited ultrahigh-resolution photoemission study of anisotropic s-wave superconductor YNi2B2C. Physica B: Condensed Matter, 378-380(SPEC. ISS.), 469-470. https://doi.org/10.1016/j.physb.2006.01.204